Guest shape-responsive fitting of porous coordination polymer with shrinkable framework

被引:288
作者
Matsuda, R
Kitaura, R
Kitagawa, S [1 ]
Kubota, Y
Kobayashi, TC
Horike, S
Takata, M
机构
[1] Kyoto Univ, Dept Synthet Chem & Biol Chem, Nishikyo Ku, Kyoto 6158510, Japan
[2] Osaka Womens Univ, Dept Environm Sci, Sakai, Osaka 5900035, Japan
[3] Okayama Univ, Fac Sci, Dept Phys, Okayama 7008530, Japan
[4] JASRI SPring 8, Koto, Hyogo, Japan
关键词
D O I
10.1021/ja046925m
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In situ synchrotron X-ray powder diffraction patterns of porous coordination polymers {[Cu-2-(pzdc)(2)(bpy)](.)G} have been measured (pzdc = pyrazine-2,3-dicarboxylate, bpy = 4,4'-bipyridine) (where G = H2O for CPL-2 superset of H2O, G = benzene for CPL-2 superset of benzene, and G = void for the apohost). The structures of apohost and CPL-2 superset of benzene were determined from Rietveld analysis. Adsorption of benzene in the channels induced a remarkable contraction in the crystal (b axis; 6.8%, volume; 4.9%), although the channels were occupied by the benzene molecules. This crystal transformation provides a new pore structure that is well suited for benzene molecules, and we denote it as a "shape-responsive fitting" transformation. This type of pore gives rise to a new guideline: frameworks can be composed of flexible motifs that are linked via strong bond and/or stiff motifs that are connected via weaker bonds.
引用
收藏
页码:14063 / 14070
页数:8
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